Instructor’s approval________
a. Why is the electrical conductivity of NaCl (s) different from that of 0.10 M NaCl?
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b. Explain the reason for the electrical conductivity of metals.
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EXERCISE:
A. For each of the following substances, write the formula(s) of the principal, more abundant, molecular
or ionic species present in an aqueous solution of each substance.
Write only the
formulas of the ions or
molecules which are
abundant
Write only the
formulas of the ions or
molecules which are
abundant
NaOH
Pb(NO
3
)
2
KC
2
H
3
O
2
C
2
H
6
O
H
2
C
2
O
4
BaCl
2
KHS
H
2
S
HI
NH
3
HNO
2
NH
4
C
2
H
3
O
2
B. Write molecular, total, and net-ionic equations. Then predict if the mixtures would conduct electric
current and write the formulas of ions conducting electricity.
1. Silver nitrate reacting with hydrobromic acid
Molecular equation:
Total-ionic equation:
Net-ionic equation:
Any electrical conductivity?_______. List the ions conducting the electric current______________
2. Potassium chloride reacting with magnesium nitrate.
Molecular equation:
Total-ionic equation:
Net-ionic equation:
Any electrical conductivity?_______. List the ions conducting the electric current______________
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3. Sodium acetate reacting with hydrochloric acid.
Molecular equation:
Total-ionic equation:
Net-ionic equation:
Any electrical conductivity?_______. List the ions conducting the electric current______________
4. Potassium hydroxide reacting with hydrosulfuric acid
Molecular equation:
Total-ionic equation:
Net-ionic equation:
Any electrical conductivity?_______. List the ions conducting the electric current______________
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